b-u bbb bbd bbe bbl bbn bbt bbu bdb bdd bde bdl bdt bdu be- beb bed bee bel ben bet beu blb bld ble bll bln blt blu bnb bnd bne bnl bnn bnt bnu btb btd bte btl btn btt btu bub bud bue bul bun but buu dbb dbd dbe dbl dbn dbt dbu ddb ddd dde ddl ddn ddt ddu de- deb ded dee del den det deu dl- dlb dld dle dll dlt dlu dnb dnd dne dnl dnn dnt dtb dtd dte dtl dtn dtt dtu dub dud due dul dun dut ebb ebd ebe ebl ebn ebt ebu ed- edb edd ede edl edn edt edu eeb eed eee eel een eet elb eld ele ell eln elt elu en- enb end ene enl enn ent enu etb etd ete etl etn ett etu eu- eub eud eue eul eun eut lbb lbd lbe lbl lbt lbu ldb ldd lde ldl ldn ldt ldu leb led lee lel len let leu llb lld lle lll lln llt llu lnb lnd lne lnl lnn lnt lnu ltb ltd lte ltl ltt ltu lub lud lue lul lun lut luu nbb nbd nbe nbl nbn nbt nbu ndb ndd nde ndl ndn ndt ndu ne- neb ned nee nel nen net neu nlb nld nle nll nln nlt nlu nnb nne nnl nnn nnt nnu ntb ntd nte ntn ntt ntu nub nud nue nul nun nut nuu tbb tbd tbe tbl tbn tbt tbu tdb tdd tde tdl tdn tdt tdu te- teb ted tee tel ten tet teu tld tle tll tln tlt tlu tnb tnd tne tnl tnn tnt ttb ttd tte ttl ttn ttt ttu tub tud tue tul tun tut tuu ubb ube ubl ubn ubt ubu udb udd ude udl udn udt udu ueb ued uee uel uen uet ulb uld ule ull uln ult ulu un- unb und une unl unn unt unu utb utd ute utl utn utt utu uue uun uut uuu